Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11230870 | Fenestration hardware system for casement windows | — | 2022-01-25 |
| 8627579 | Heat gun air flow-extenders | — | 2014-01-14 |
| 7322619 | Integrated lock and tilt-latch mechanism for a sliding window | Douglas A. Nolte, Kenneth E. Best, Clark Velzke, Edward J. Subliskey, Glen M. Wolf | 2008-01-29 |
| 6848728 | Window fastener | Brian Dallmann, Tim Frenzen, Clark Velzke | 2005-02-01 |
| 6450554 | Sash lock actuator | Thomas J. Midas | 2002-09-17 |
| 6142541 | Pick resistant sash lock | — | 2000-11-07 |
| 4656849 | Deadbolt assembly having selectable backset distance | Richard O. Mullich, George F. Carabet | 1987-04-14 |
| 4593542 | Deadbolt assembly having selectable backset distance | Richard O. Mullich, George F. Carabet | 1986-06-10 |
| 4564229 | Latch assembly having selectable backset distance | Richard O. Mullich | 1986-01-14 |
| 4397168 | Door reinforcement and lock guard plate | Richard O. Mullich | 1983-08-09 |